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Finding the Fourth Proportional to 100,063.69, 138,160.08 and 61,875.59

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Solution

The fourth proportional to 100,063.69, 138,160.08 and 61,875.59 is: 85,432.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,063.69 : 138,160.08 = 61,875.59 : x
  2. Step 2: Convert to fraction form
    100,063.69/138,160.08 = 61,875.59/x
  3. Step 3: Cross multiply
    100,063.69x = 138,160.08 × 61,875.59
  4. Step 4: Simplify right side
    100,063.69x = 8,548,735,773.65
  5. Step 5: Solve for x
    x = 8,548,735,773.65/100,063.69
  6. Step 6: Final answer
    x = 85,432.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.